Huawei EulerOS: Security Advisory for ntp (EulerOS-SA-2020-1968)

Published: 2020-09-08 08:07:47
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:M/Au:N/C:N/I:P/A:P

Summary:
The remote host is missing an update for the Huawei EulerOS 'ntp' Linux Distribution Package(s) announced via the EulerOS-SA-2020-1968 advisory.

Detection Method:
Checks if a vulnerable Linux Distribution Package version is present on the target host.

Technical Details:
A flaw was found in the Network Time Protocol (NTP), where a security issue exists that allows an off-path attacker to prevent the Network Time Protocol daemon (ntpd) from synchronizing with NTP servers not using authentication. A server mode packet with a spoofed source address sent to the client ntpd causes the next transmission to be rescheduled, even if the packet does not have a valid origin timestamp. If the packet is sent to the client frequently enough, it stops polling the server and is unable to synchronize with it.(CVE-2020-11868) A high-performance ntpd instance that gets its time from unauthenticated IPv4 time sources may be vulnerable to an off-path attacker who can query time from the victim's ntpd instance. An attacker who can send a large number of packets with the spoofed IPv4 address of the upstream server can use this flaw to modify the victim's clock by a limited amount or cause ntpd to exit.(CVE-2020-13817)

Affected Versions:
'ntp' Linux Distribution Package(s) on Huawei EulerOS Virtualization for ARM 64 3.0.2.0.

Recommendations:
Please install the updated Linux Distribution Package(s).

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2020-11868
https://nvd.nist.gov/vuln/detail/CVE-2020-13817

References:


https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2020-1968

Severity
Medium
CVSS Score
5.8
Published
2020-09-08
Modified
2020-09-08
Category
Huawei EulerOS Local Security Checks

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